Amazon Attribution

Overview

Amazon Attribution is a measurement tool that helps advertisers understand how their non-Amazon marketing channels (search ads, social media, display advertising, email campaigns) drive traffic and sales on Amazon. Its tracking tags appear on advertiser websites and landing pages to capture the customer journey from an external ad click through to an Amazon purchase, providing cross-channel attribution data.

What This Script Does

Amazon Attribution deploys tracking pixels and JavaScript tags on advertiser websites and within ad creatives. These tags load from ats.amazon-adsystem.com and related Amazon advertising domains. The tracking operates through two primary mechanisms:

1. Click-through tracking — When a user clicks an ad that leads to an Amazon product page, the attribution tag appends a tracking parameter to the Amazon URL. This parameter links the subsequent Amazon browsing and purchase behavior back to the original ad click.

2. View-through and site-level tracking — Pixels fire on the advertiser's website to record page views, product interactions, and other pre-Amazon events. These events are correlated with any subsequent Amazon activity by the same user.

Cookies set by Amazon Attribution include:

• Cookies under amazon-adsystem.com for cross-site user identification, linking the user's activity on the advertiser's website to their Amazon identity
• ad-id — Amazon's advertising identifier; 270-day expiry; used for cross-site attribution matching
• Session-level cookies for deduplicating attribution events within a single browsing session

The attribution tags transmit the following data to Amazon's measurement servers:

• Page URL and referrer on the advertiser's site
• Campaign identifiers linking the event to specific ad creatives and channels
• Timestamp and user agent data
• Amazon advertising identifiers for cross-site matching

Amazon Attribution combines this data with Amazon's purchase data to generate attribution reports showing which marketing channels and campaigns drove the most Amazon sales, page views, and add-to-cart actions.

Consent & Compliance

Amazon Attribution is classified as marketing and analytics. It tracks user behavior across websites for advertising measurement and campaign optimization. The cross-site tracking and purchase attribution make it a clear marketing/analytics tool.

Under the GDPR, Amazon Attribution requires explicit consent. The tags process personal data (browsing behavior, advertising identifiers, cross-site activity) for marketing measurement purposes. The cross-site nature of the tracking — linking behavior on the advertiser's website to Amazon purchase activity — makes legitimate interest an inadequate legal basis. Consent under Article 6(1)(a) is required.

Under the ePrivacy Directive, the attribution cookies (including the 270-day ad-id cookie) are set for advertising measurement, not for any user-requested service. Article 5(3) requires prior consent before these cookies may be placed.

Under CCPA/CPRA, Amazon Attribution constitutes sharing of personal information for cross-context behavioral advertising. The entire purpose of the tool is to connect user activity across the advertiser's website and Amazon — a textbook definition of cross-context tracking. Websites must disclose this data sharing, honor opt-out requests, and respect GPC signals.

Should You Block This Without Consent?

Yes. Amazon Attribution tracking tags exist solely for cross-channel advertising measurement, linking user behavior on the advertiser's website to Amazon purchase data. They set cross-site tracking cookies and share data with Amazon's advertising platform. These tags must not fire before the user grants marketing consent.